If a shape is wobbling and about to fall you may still be able to grab it by clicking on it.
On Level 19, you should try to get the Red ball on
the top right first, since it is the hardest.
What I do is aim straight and when the spinning
thing is almost straight up and down, shoot so it
will bounce it slightly to the right. Good luck!
If your ball gets stopped or held up then you get to keep it and shoot again.